13 53 596 Replacing high pressure fuel sensor (N54, N54T)
Special tools required:
Observe warning on cylinder head cover.
Disconnect NEGATIVE BATTERY TERMINAL (risk of fire due to short-circuiting on dismantling).
Electric fuel pump starts up automatically when door is opened!
Carry out installation work on fuel system only with coolant temperature below 40°C.
Wear full face guard and protective gloves.
Fuel can emerge spontaneously at high speed when the high pressure line is released!
Adhere to conditions of absolute cleanliness when working on the high-pressure fuel system.
Introduced contaminants can cause malfunctions in the system!
- Do not allow any dirt particles or foreign bodies to get into the system.
- Remove all traces of dirt contamination before removing lines or separate components.
- Use only fluff-free cloths.
- Seal all fuel system openings with protective caps or plugs.
Necessary preliminary tasks:
- Remove ACOUSTIC COVER
Recycling:
Fuel escapes when fuel lines are detached.
Catch and dispose of escaping fuel in a suitable container.
Observe country-specific waste disposal regulations.
Unlock connector (1) and remove.
Release high pressure sensor (2) and remove.
Tightening torque 13 53 3AZ with special tool.32 2 100
Seal rail (3) 32 1 270 if necessary with a matching plug from set of special tools.
The high pressure sensor may only be screwed back in 3 times!
Therefore mark the sensor with a blue dot each time it is screwed back in.
Required follow-up work:
Check fuel system for tightness.
Check function of DME.